1. In my opinion, it's important for us to protect the earth.
2. In my opinion, you are very clever.
3. In my opinion, learning English is not too difficult.
4. In my opinion, she should go to school tomorrow.
5. In my opinion, xx is a good boy/girl.
6. In his opinion, prices were still absurdly low.
7. In public opinion, there has been a polarization on this issue.
8. Everyone had an opinion on the subject.
希望这些例句对你有所帮助!